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Open AccessArticle

A Subspace Approach to Sparse Sampling Based Data Gathering in Wireless Sensor Networks

Tianjin Key Laboratory of Electronic Materials and Devices, School of Electronics and Information Engineering, Hebei University of Technology, 5340 Xiping Road, Beichen District, Tianjin 300401, China
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Sensors 2020, 20(4), 985; https://doi.org/10.3390/s20040985 (registering DOI)
Received: 31 December 2019 / Revised: 5 February 2020 / Accepted: 6 February 2020 / Published: 12 February 2020
Data gathering is an essential concern in Wireless Sensor Networks (WSNs). This paper proposes an efficient data gathering method in clustered WSNs based on sparse sampling to reduce energy consumption and prolong the network lifetime. For data gathering scheme, we propose a method that can collect sparse sampled data in each time slot with a fixed percent of nodes remaining in sleep mode. For data reconstruction, a subspace approach is proposed to enforce an explicit low-rank constraint for data reconstruction from sparse sampled data. Subspace representing spatial distributions of the WSNs data can be estimated from previous reconstructed data. Incorporating total variation constraint, the proposed reconstruction method reconstructs current time slot data efficiently. The results of experiments indicate that the proposed method can reduce the energy consumption and prolong the network lifetime with satisfying recovery accuracy. View Full-Text
Keywords: wireless sensor networks; data gathering; sparse sampling; subspace; data reconstruction wireless sensor networks; data gathering; sparse sampling; subspace; data reconstruction
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He, J.; Zhang, X.; Zhou, Y.; Maibvisira, M. A Subspace Approach to Sparse Sampling Based Data Gathering in Wireless Sensor Networks. Sensors 2020, 20, 985.

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